Migrated to expects v0.4.x

Hi @d11wtq!

A few weeks ago I released expects 0.4 that introduced some backwards incompatible syntax changes: http://expects.readthedocs.org/en/v0.4.2/changes.html#ago-15-2014

I found that your project were using it and thought I could help with the migration. Hope you like it!

I'm looking for your feedback :smile: